<template>
	<div class="card filter">
		<div class="card-container">
			<h4 class="title sle" v-if="title">{{ title }}</h4>
			<!-- <el-button type="primary" :icon="CirclePlus" @click="openDrawer('新增')">新增用户</el-button> -->

			<div class="filterHeader"><slot name="filterHeader"></slot></div>

			<el-input v-model="filterText" placeholder="输入关键字进行过滤" clearable />
			<div
			  v-loading="loading"
				class="el-scrollbar"
				:style="{ '--el-icon-show': icon ? `none` : `block`, height: title ? `calc(100% - 95px)` : `calc(100% - 56px)` }"
			>
				<el-tree
					ref="treeRef"
					class="custom-icons-tree"
					default-expand-all
					:node-key="id"
					:data="multiple ? treeData : treeAllData"
					:show-checkbox="multiple"
					:check-strictly="false"
					:current-node-key="!multiple ? selected : ''"
					:highlight-current="!multiple"
					:expand-on-click-node="false"
					:check-on-click-node="multiple"
					:props="defaultProps"
					:filter-node-method="filterNode"
					:default-checked-keys="multiple ? selected : []"
					@node-click="handleNodeClick"
					@check="handleCheckChange"
				>
					<template #default="{ node, data }">
						<div class="el-tree-part" :style="{ 'padding-left': icon ? '5px' : 0 }">
							<div class="el-tree-node__label" :title="node.label">
								<div v-if="icon" class="icon-cus">
									<el-icon @click="node.expanded = !node.expanded" v-show="data.children && data.children.length > 0"
										><component :is="node.expanded ? icon.open : icon.close"></component
									></el-icon>
								</div>
								<span class="overOne">{{ node.label }}</span>
							</div>

							<div v-if="rightMenuFilter(data)" class="handle-icon" @click.stop="() => {}">
								<el-dropdown>
									<el-icon class="icon" title="更多"><MoreFilled /></el-icon>
									<template #dropdown>
										<el-dropdown-menu>
											<el-dropdown-item @click="() => edit(data)">编辑</el-dropdown-item>
											<el-dropdown-item @click="() => addSon(data)">添加子级</el-dropdown-item>
											<el-dropdown-item @click="() => del(data)">删除</el-dropdown-item>
											<!-- <el-dropdown-item @click.stop="() => edit(data)">编辑</el-dropdown-item>
											<el-dropdown-item @click.stop="() => addSon(data)">添加子级</el-dropdown-item>
											<el-dropdown-item @click.stop="() => del(data)">删除</el-dropdown-item> -->
										</el-dropdown-menu>
									</template>
								</el-dropdown>
							</div>
						</div>
					</template>
				</el-tree>
			</div>
		</div>
	</div>
</template>

<script setup lang="tsx" name="TreeFilter">
import { ref, watch, onBeforeMount } from "vue";
import { ElTree } from "element-plus";
import { MoreFilled } from "@element-plus/icons-vue";

// 接收父组件参数并设置默认值
interface TreeFilterProps {
	requestApi?: (data?: any) => Promise<any>; // 请求分类数据的 api ==> 非必传
	data?: { [key: string]: any }[]; // 分类数据，如果有分类数据，则不会执行 api 请求 ==> 非必传
	title?: string; // treeFilter 标题 ==> 非必传
	id?: string; // 选择的id ==> 非必传，默认为 “id”
	label?: string; // 显示的label ==> 非必传，默认为 “label”
	multiple?: boolean; // 是否为多选 ==> 非必传，默认为 false
	defaultValue?: any; // 默认选中的值 ==> 非必传
	showAll?: boolean;
	rightMenuFilter?:(data:any)=>boolean;
	icon?: {
		open: string;
		close: string;
	};
}
const props = withDefaults(defineProps<TreeFilterProps>(), {
	id: "id",
	label: "label",
	multiple: false,
	showAll: false,
	rightMenuFilter:()=>true,
	icon: undefined
});

const defaultProps = {
	children: "children",
	label: props.label
};

const filterText = ref<string>("");

const treeRef = ref<InstanceType<typeof ElTree>>();
const treeData = ref<{ [key: string]: any }[]>([]);
const treeAllData = ref<{ [key: string]: any }[]>([]);
// 选中的值
const selected = ref();

const selectedRowId = ref<number | string>(0);

const edit = (data: any) => emit("edit", data);
const del = (data: any) => emit("del", data);
const addSon = (data: any) => emit("addSon", data);

onBeforeMount(() => initData(true));

watch(filterText, val => {
	treeRef.value!.filter(val);
});

// 过滤
const filterNode = (value: string, data: { [key: string]: any }, node: any) => {
	if (!value) return true;
	let parentNode = node.parent,
		labels = [node.label],
		level = 1;
	while (level < node.level) {
		labels = [...labels, parentNode.label];
		parentNode = parentNode.parent;
		level++;
	}
	return labels.some(label => label.indexOf(value) !== -1);
};

interface FilterEmits {
	(e: "change", value: any): void;
	(event: "edit", data: any): void;
	(event: "handleNodeClickItem", item: any): void;
	(event: "del", data: any): void;
	(event: "addSon", data: any): void;
}
const emit = defineEmits<FilterEmits>();

const pre = ref<string | number | undefined>(undefined);

// 单选
const handleNodeClick = (data: { [key: string]: any }) => {
	if (props.multiple) return;
	if (pre.value !== data[props.id]) {
		selectedRowId.value = data[props.id];
		emit("change", data[props.id]);
		emit("handleNodeClickItem", data);
		pre.value = data[props.id];
	}
};

const getClickRowId = () => {
  return	selectedRowId.value;
}

// 多选
const handleCheckChange = () => {
	emit("change", treeRef.value?.getCheckedKeys());
};

const loading = ref<boolean>(false);

const initData = async (first: boolean = false) => {
	if (props.multiple) selected.value = Array.isArray(props.defaultValue) ? props.defaultValue : [props.defaultValue];
	else selected.value = props.defaultValue;
	// 有数据就直接赋值，没有数据就执行请求函数
	// if (props.data?.length) {
	// 	treeData.value = props.data;
	// 	treeAllData.value = props.data;
	// 	return;
	// }
	loading.value = true;
	const { data } = await props.requestApi!();
	treeData.value = data;
	treeAllData.value = props.showAll === true ? [{ id: "", [props.label]: "全部" }, ...data] : data;

	if (!props.multiple && first === true && treeData.value.length > 0) {
		//第一次
		selected.value = treeData.value[0][props.id];
		handleNodeClick(treeData.value[0]);
	} else if (first === true) {
		selected.value = 0;
		selectedRowId.value = 0;
		emit("change", 0);
	}
	loading.value = false;
};

// 暴露给父组件使用
defineExpose({ treeData, treeAllData, initData,getClickRowId });
</script>

<style scoped lang="scss">
@import "./index.scss";
</style>
